Alternative keyboards
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      "Basic information concerning common alternative keyboard designs and their effects on work posture was provided to aid in selection of alternative keyboard designs. Alternative keyboards may assist in keeping wrists straight, thus alleviating stress to the musculoskeletal system. Split keyboards may straighten the wrist by either increasing the distance between the right and left sides of the keyboard, or by rotating each half of the keyboard. Tented keyboards have the two keyboard halves tilted up, reducing the rotation of the forearms. Built in wrist or palm rests help prevent bending the hands up by providing support that straightens the wrists. Keyboards with a negative slope help straighten the wrist. Some keyboards attempt to fit the different lengths of the fingers by curving the rows of keys or by placing the keys in concave wells. In selecting alternative keyboards several matters must be considered: compatibility with existing hardware and software, fit with the rest of the workstation, effects on the performance of the user, use of a trial period, anticipating some initial frustration, involving a specialist in the decision making process, and integrating the new equipment into the work process carefully." - NIOSHTIC-2
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